Couplings Stop Failure of Underground Mine Trucks

A large construction and mining company has purchased couplings from Renold to provide a long-term solution to eliminate the constant failure of couplings on its underground mine trucks. For many years, the company was fitting V-type rubber-in-shear couplings between the engine and the gearbox. However, when the coupling failed, the truck was coming to a complete stop, often blocking an important access point. Renold recommended the HTB 4500 rubber-in-compression coupling.

Its intrinsically failsafe, maintenance-free and severe shock load protection properties, coupled with its high temperature capability of up to 200C, made it a suitable choice. A rubber-in-compression coupling was also favoured by the company as it can drive metal to metal to move the truck out of the way and continue mining if the rubber blocks disintegrate. This was illustrated when a problem with the oil circulation in the gearbox resulted in the gearbox overheating and destroying the rubber blocks in the coupling - the truck, however, could still be moved.

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